Problem Statement Consecutive Characters LeetCode Solution – The power of the string is the maximum length of a non-empty substring that contains only one unique character. Given a string s, return the power of s. Input: s = “leetcode” Output: 2 Explanation: The substring “ee” is of length 2 with the character ‘e’ only. Explanation …
Problem Statement The Symmetric Tree LeetCode Solution – “Symmetric Tree” states that given the root of the binary tree and we need to check if the given binary tree is a mirror of itself (symmetric around its center) or not? If Yes, we need to return true otherwise, false. Example: …
Problem Statement Maximum Product of Three Numbers LeetCode Solution – We are given an array, the question asks us to calculate the maximum product of any 3 numbers. Examples Example 1: Input: nums = [1,2,3] Output: 6 Example 2: Input: nums = [1,2,3,4] Output: 24 Example 3: Input: nums = …
Problem Statement Excel Sheet Column Title LeetCode Solution – We are given a column number (let’s call it colNum) and need to return its corresponding column title as it appears in an excel sheet For example A -> 1 B -> 2 C -> 3 … Z -> 26 AA …
Problem Statement Valid Perfect Square LeetCode Solution – Given a positive integer num, write a function that returns True if num is a perfect square else False. Follow up: Do not use any built-in library function such as sqrt. Input: num = 16 Output: true Explanation A boundary for our solution is fixed. for any number …
Problem Statement Strobogrammatic Number LeetCode Solution – Given a string num which represents an integer, return true if num is a strobogrammatic number. A strobogrammatic number is a number that looks the same when rotated 180 degrees (looked at upside down). Example Test Case 1: Input: num = “69” Output: true Test Case 2: Input: num = “692” Output: false Explanation …
Problem Statement Merge Two Binary Trees LeetCode Solution – You are given two binary trees root1 and root2. Imagine that when you put one of them to cover the other, some nodes of the two trees are overlapped while the others are not. You need to merge the two trees into …
Problem Statement Reverse Only Letters LeetCode Solution – Given a string s, reverse the string according to the following rules: All the characters that are not English letters remain in the same position. All the English letters (lowercase or uppercase) should be reversed. Return s after reversing it. Input: s = “ab-cd” …
Problem Statement Repeated Substring Pattern LeetCode Solution – Given a string s, check if it can be constructed by taking a substring of it and appending multiple copies of the substring together. Input: s = “abab” Output: true Explanation: It is the substring “ab” twice. Explanation The first char of …
Problem Statement The Shortest Word Distance LeetCode Solution – says that you’re given an array of strings and two different words. We need to return the shortest distance between these two words that appear in the input string. Example: Input: wordsDict = [“practice”, “makes”, “perfect”, “coding”, “makes”], word1 = “coding”, word2 = “practice” Output: 3 Explanation: Word “coding” occurs at position 4. …